<?php


namespace app\tickets\controller;


use app\common\controller\Common;
use think\Session;

class Applet
{
    /**
     * 生成微信二维码
     * @return string
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\ModelNotFoundException
     * @throws \think\exception\DbException
     * @author zhixuedong
     * @date 2021/1/27/027
     */
    public function getWxcode($code){
        $ACCESS_TOKEN=$this->getWxAccessToken();
        $url="https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=".$ACCESS_TOKEN['access_token'];
        $post_data=
            array(
                'page'=>'pages/public/payment',
                'width'=>'250',
                'scene'=>$code//34%2CS853EE4QRP
            );
        $post_data=json_encode($post_data);
        $data=$this->send_post($url,$post_data);
        $result=$this->data_uri($data,'image/png');
        return $result;
        //return '<image src='.$result.'></image>';
    }
    /**
     * 消息推送http
     * @param $url
     * @param $post_data
     * @return bool|string
     */
    protected function send_post( $url, $post_data ) {
        $options = array(
            'http' => array(
                'method'  => 'POST',
                'header'  => 'Content-type:application/json',
                //header 需要设置为 JSON
                'content' => $post_data,
                'timeout' => 60
                //超时时间
            )
        );
        $context = stream_context_create( $options );
        $result = file_get_contents( $url, false, $context );
        return $result;
    }
//二进制转图片image/png
    public function data_uri($contents, $mime)
    {
        $base64   = base64_encode($contents);
        return ('data:' . $mime . ';base64,' . $base64);
    }


    /**
     * 获取小程序AccessToken（第一步）
     * @return array|mixed
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\ModelNotFoundException
     * @throws \think\exception\DbException
     * @author zhixuedong
     * @date 2021/1/27/027
     */
    public function getWxAccessToken(){
        $common = new Common();
        //获取access_token
        //获取平台信息
        $config = "config";
        $thisWechat = Session::get("thisWechat");
        $configWhere['id'] = $thisWechat['id'];
        $configField = "xcx_appid,xcx_appsecret";
        $configValue = $common->public_select($config,$configWhere,$configField)->find();

        $appid = $configValue['xcx_appid'];
        $appsecret = $configValue['xcx_appsecret'];
        if(Session::get('access_token_'.$appid) && Session::get('expire_time_'.$appid)>time()){
            return Session::get('access_token_'.$appid);
        }else{
            $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$appid."&secret=".$appsecret;
            $access_token = $this->makeRequest($url);
            $access_token = json_decode($access_token['result'],true);
            Session::set('access_token_'.$appid,$access_token);
            Session::set('expire_time_'.$appid,time()+7000);
            return $access_token;
        }
    }
    /**
     * 发起http请求
     * @param string $url 访问路径
     * @param array $params 参数，该数组多于1个，表示为POST
     * @param int $expire 请求超时时间
     * @param array $extend 请求伪造包头参数
     * @param string $hostIp HOST的地址
     * @return array    返回的为一个请求状态，一个内容
     */
    public function makeRequest($url, $params = array(), $expire = 0, $extend = array(), $hostIp = '')
    {
        if (empty($url)) {
            return array('code' => '100');
        }

        $_curl = curl_init();
        $_header = array(
            'Accept-Language: zh-CN',
            'Connection: Keep-Alive',
            'Cache-Control: no-cache'
        );
        // 方便直接访问要设置host的地址
        if (!empty($hostIp)) {
            $urlInfo = parse_url($url);
            if (empty($urlInfo['host'])) {
                $urlInfo['host'] = substr(DOMAIN, 7, -1);
                $url = "http://{$hostIp}{$url}";
            } else {
                $url = str_replace($urlInfo['host'], $hostIp, $url);
            }
            $_header[] = "Host: {$urlInfo['host']}";
        }

        // 只要第二个参数传了值之后，就是POST的
        if (!empty($params)) {
            curl_setopt($_curl, CURLOPT_POSTFIELDS, http_build_query($params));
            curl_setopt($_curl, CURLOPT_POST, true);
        }

        if (substr($url, 0, 8) == 'https://') {
            curl_setopt($_curl, CURLOPT_SSL_VERIFYPEER, FALSE);
            curl_setopt($_curl, CURLOPT_SSL_VERIFYHOST, FALSE);
        }
        curl_setopt($_curl, CURLOPT_URL, $url);
        curl_setopt($_curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($_curl, CURLOPT_USERAGENT, 'API PHP CURL');
        curl_setopt($_curl, CURLOPT_HTTPHEADER, $_header);

        if ($expire > 0) {
            curl_setopt($_curl, CURLOPT_TIMEOUT, $expire); // 处理超时时间
            curl_setopt($_curl, CURLOPT_CONNECTTIMEOUT, $expire); // 建立连接超时时间
        }

        // 额外的配置
        if (!empty($extend)) {
            curl_setopt_array($_curl, $extend);
        }

        $result['result'] = curl_exec($_curl);
        $result['code'] = curl_getinfo($_curl, CURLINFO_HTTP_CODE);
        $result['info'] = curl_getinfo($_curl);
        if ($result['result'] === false) {
            $result['result'] = curl_error($_curl);
            $result['code'] = -curl_errno($_curl);
        }

        curl_close($_curl);
        return $result;
    }
}